Lasting machine with adhesive applicator



July 2, 1968 v, D, BENKEN 3,390,411

LASTING MACHINE WITH ADHESIVE APPLICATOR Filed June 7, 1966 4Sheets-Sheet 1 -sucr/on/ INVENTOR HENRY V. D. BENKEN BY/F'M ATTY.

y 2, 1968 H. v. D. BENKEN 3,390,411

LAS'IING MACHINE WITH ADHESIVE APPLICATOR 4 Sheets-Sheet 2 Filed June 7,1966 July 2, 1968 H. v. D. BENKEN 3,390,411

LASTING MACHINE WITH ADHESIVE APPLICATOR Filed June 7, 1966 4Sheets-Sfieet .3

2, 1968 H. v. D. BENKEN LASTING MACHINE WITH ADHESIVE APPLICATOR 4Sheets-Sheet 4 Filed June 7. 1966 am .3 g m a Maw T /4 United StatesPatent 3,390,411 LASTING MACHINE WITH ADHESIVE APPLICATOR Henry v. d.Benken, West Roxbury, Mass., assignor to Compo Shoe MachineryCorporation, Waltham, Mass.,

a corporation of Delaware Filed June 7, 1966, Ser. No. 555,885 30Claims. (Cl. 12-7) ABSTRACT OF THE DISCLOSURE A shoe lasting machineembodying a shoe support of smaller area than the bottom of the shoe tobe lasted for supporting, bottom down, an upper and insole assembled ona last, an applicator in the form of a ring surrounding the support forengagement with the marginal edge of the insole, said applicator ringcontaining a groove to which liquid adhesive is adapted to be suppliedfor application to the margin of the insole, and a dual pump fordelivering liquid adhesive from a reservoir of adhesive to theapplicator ring while the latter is in contact with the margin of theinsole and to return the adhesive left in the applicator to thereservoir when the applicator is lowered from the margin of the insoleto permit wiping of the marginal edge of the upper into engagement withthe adhesive-coated margin of the insole.

Recently there have been a number of attempts to incorporate in alasting machine means for applying liquid or molten adhesive directly tothe marginal edge of the insole prior to or during the tensioning of theupper and then while continuing to support the upper and insoleassembly, separating the applicator from the insole appreciably toenable wiping the lasting margin into engagement therewith. Thedifficulty in such prior machines has been to supply suflicient adhesiveto the margin to obtain an effective bond without overflow of thesurplus adhesive onto the bottom support, wipers and other pertinentparts of the machine.

It is the purpose of this invention to provide a machine of theforegoing kind with means which enables applying adhesive in suflicientamount to obtain a good bond and removing the excess from the vicinityof the lasting instrumentalities; to provide means for supplyingadhesive in liquid form to the insole by circulating it from a reservoirto an applicator and from thence back to the reservoir, thereby toreduce deterioration of the adhesive, to present fresh adhesive for eachapplication, to prevent stagnation, and to prevent accumulation withinthe circulatory system; and to provide means which is clean, dependableand durable.

As herein illustrated, the aforesaid means comprises in conjunction withlasting instrumentalities and a rigid bottom support for supporting anupper and insole assembled on a last bottom down, an adhesive applyingring surrounding the bottom support. The upper surface of the bottomsupport and ring are collectively concave, corresponding substantiallyin contour to the bottom side of the insole, there is a space betweenthe outer edge of the bottom support and the inner edge of the ring, andthe ring contains a groove located in spaced relation to its outer edgeand in confronting relation to the margin of the insole for receivingadhesive under pressure when the insole and ring are held engaged toeffect deposition of adhesive on the insole. A receptacle is supportedbelow the ring beneath the space between the ring and the bottom supportfor receiving the surplus adhesive which is displaced inwardly from thering by the lasting operation and/or gravity to prevent accumulation onthe bottom support and for receiving from the groove, the ends of whichare connected thereto, the residual adhesive 3,390,411 Patented July 2,1968 left in the groove so that both the surplus and the residualadhesive may be returned to a reservoir for recirculation.

To enable accurate seating of the insole and ring, the latter isyieldably supported for translatory movement perpendicular to the bottomsupport and for angular movement about axes longitudinally andtransversely of the bottom support. Adjustments are provided forcontrolling the extent of movement and the resistance to such movement.The support for the ring also supports a receptacle and the two aremovable downwardly relative to the bottom support to enable lasting themarginal edge of the upper following the application of the adhesive tothe insole.

The ring is supplied with adhesive and adhesive is exhausted from thereceptacle by a pump which acts on one stroke to supply adhesive to thegroove in the ring and on the other stroke to remove adhesive from thereceptacle. The pump is located in a reservoir of liquid or moltenadhesive and has two pistons which act in conjunction in one directionof movement to exhaust adhesive from the receptacle into one of a pairof chambers and to suck fresh adhesive from the reservoir into the otherof the pair of chambers and in the other direction to return theexhausted adhesive to the reservoir and inject the fresh adhesive intothe ring. The pump is driven by a pressure fluid operable motor and thelatter may be controlled manually or automatically.

The invention will now be described in greater detail with reference tothe accompanying drawings wherein:

FIG. 1 is an elevation, partly in section, of a shoe support andapplicator for use in conjunction with a lasting machine for supportingan upper and insole assembled on a last preparatory to application ofadhesive to the margin of the insole and lasting of the margin edge ofthe upper to the adhesive-coated margin of the insole;

FIG. 2 is a plan view of the support and applicator;

FIG. 3 is a vertical section taken on the line 3-3 of FIG. 2;

FIG. 4 is a vertical section FIG. 2;

FIG. 5 is a plan view, partly in section, of a reservoir for holdingmolten adhesive which is to be delivered to the applicator;

FIG. 6 is a fragmentary elevation, partly in section, as seen from thelower side of FIG. 5;

FIG. 7 is a vertical section taken on FIG. 5; and

FIG. 8 is a horizontal section taken on the line 8-8 of FIG. 7.

The support and applicator herein illustrated comprise part of a lastingmachine which, in conjunction with a hold-down of a suitable kind, notherein illustrated, support an upper and insole assembled on a lastbottom side down for application of adhesive to the marginal edge of theinsole, stretching of the upper material over the last and wiping themarginal edge of the upper into engagement with the adhesive-coatedunderside of the insole. In the machine with which the support andapplicator are employed, the support is normally inclined so that whenthe upper and insole assembly are mounted on it with the heel end of theassembly toward the operator, the toe slopes upwardly and away from theoperator toward the lasting instrumentality. For the sake ofillustration, however, in order that the support may be centered on thedrawing, the axis XX of the support is shown perpendicular rather thaninclined.

The support comprises a rigid plate 10 secured to the upper end of ahollow post 12 adjacent lasting instrumentalities, which are hererepresented as lasting pinchers 14, and wiping means 16. The plate 10supports the bottom from the tip of the toe to approximately the ballline and is of smaller area than the bottom of the insole so taken onthe line 4-4 of the line 77 of that the latter projects laterallytherefrom all the Way around. The upper surface 18 of the support isconcave and of a configuration corresponding substantially to thecurvature of the bottom side of the insole. The plate has asubstantially rectangular rear portion (FIG. 2) and a triangular forwardportion following, in general, the configuration of the forepart of theinsole and contains in its upper surface a shallow recess 20 whichreduces the supporting surface to relatively narrow, spaced parallelportions 2222 at the rear end and converging portions 24-24 at theforward end which intersect at the toe. A tongue 26 is formed integralwith the underside of the plate and this fits into a slot 28 formed inthe upper end of an adaptor 30 by means of which the plate is mounted onthe post 12. Threaded openings 32 are provided at the bottom of therecess 20 which extend through the tongue in which are mounted adjustingscrews 34, the lower ends of which bottom on the slot 28 and provide foradjusting the level of the plate 10 on the post. The adaptor 30 has atits lower end a shaft 33 which sets into the upper end of the post 12and is prevented from rotating therein by a pin 38 mounted diametricallytherein, with its ends seated in slots 40 in the post.

The adhesive applicator comprises a ring 42 supported around the plate10 which corresponds in configuration to the insole, that is the outeredge of the applicator corresponds in shape to the peripheral edge ofthe insole. The inner edge corresponds substantially in shape to theouter edge of the plate 10, but is spaced therefrom so as to provide anopening 44 between the applicator ring and the plate all the way aroundas clearly indicated in FIG. 2. The upper surface 46 of the ring issloped and has a curvature which corresponds to the curvature of thebottom side of the insole at the margin and contains adjacent to butspaced from its outer edge a groove 48 which extends all the way aroundthe ring, that is from the tip rearwardly along the opposite sides tosubstantially the ball line where it intersects transversely extendinggrooves 50, the inner ends of which are in communication with the space44 between the ring and the plate. The groove 48 contains at the tip ofthe toe and at opposite sides of the tip and spaced rearwardly therefrominjection openings 52 through which adhesive is adapted to be injectedto fill the groove. The grooves at the rear ends of the groove 48provide for draining off the adhesive in the groove 48 which will flowrearwardly along the groove by reason of the inclination of the ring.

Adhesive is supplied to the groove 48 and exhausted therefrom, as willappear hereinafter, to effect application of adhesive to the lastingmargin of the insole while the ring is held against the insole.Following application of the adhesive to the insole, the ring 42 islowered to permit the lasting margin of the upper to be wiped intoengagement with the insole and during this period the surplus adhesivewhich is left in the groove and any surplus adhesive which is displacedinwardly from the groove during the wiping operation is collected in areceptacle 54 supported below the ring and returned therefrom to areservoir. The receptacle 54 corresponds generally in shape to the ringand provides support for the latter, having for this purpose a flatupper edge 56 on which the lower side of the ring 42 rests and to whichit is secured by bolts 58 which extend through suitable holes in thering and are threaded into the upper edge of the receptacle. Thereceptacle has in its upper side a shallow trough 60 which underlies thespace 44 situated between the plate and the ring and parts of the plateand ring, the inner side being constituted by a flange-like wall 62bounding a central opening 64 through it through which the adaptorprojects. The trough 60 provides for receiving the adhesive which flowsinwardly from the groove 48 in the ring and into the space 44, so as toprevent accumulation of adhesive on the plate 10. At the rear end of thereceptacle there is a longitudinally narrow, transversely wide andvertically deep well 66 into which the adhesive from the trough 60 flowsand into which adhesive from the groove 48 flows by way of the grooves50. A strainer 68 is supported on a ledge 70 at the top of the well andan outlet opening 72 is provided at the bottom of the well into which isinserted a fitting 74 for receiving one end of a return pipe 76 by meansof which adhesive which collects in the well may be extracted. Theforward end of the receptacle 54 contains a passage 78, the lower end ofwhich is provided with an opening 80 into which a fitting 82 is insertedby means of which one end of a delivery pipe 84 is connected to thepassage for supplying adhesive thereto. The upper end of the passage 78is provided with a fitting 86 which projects into the lower side of thering 42 for conducting the adhesive from the passage 78 to the groove 48in the ring. Heating elements 11 are mounted in cored openings in thewalls of the receptacle.

The ring 42 is desirably supported so that it can adjust itself to thebottom of the insole and to this end the ring and the receptacle areyieldably mounted on the post 12 for movement relative to the plate 10in translation and angularly about the longitudinal and transverse axesof the bottom. As illustrated, this movement is afforded by a bracketmember 88 mounted on the post 12 comprising a sleeve-like portion 90freely slidable on the post and supported at its lower end on the upperend of a coiled spring 92 encircling the post, the lower end of whichbears upon a collar 94 fixed to the post. The translatory movement ofthe bracket on the post is limited by a slot 96 in the post and a pin 98mounted in the sleeve and extending through the slot. A collar 100threaded onto the upper end of the post, which is provided with a thread102 for this purpose, enables controlling the heightwise position of thebracket 88 on the post.

The bracket 88 has a radially extending boss 104 at the left side, asshown in FIG. 1, which contains a vertical bore 106 in which is mountedthe lower end of a rod 108. The upper end of the rod has on it atruncated ball 110 which is rotatably connected to the lower side of thereceptacle by a cage 112 bolted to the bottom. At the right side of thebracket there are symmetrically disposed, transversely spaced sleeves114-414 supported at the outer ends of diverging arms 116-116 and eachsleeve contains a vertical opening 118 for receiving the lower end of arod 120. The upper end of each rod is provided with a truncated ball 110corresponding to that at the upper end of the rod 108 which is rotatablyconnected to the lower side of the receptacle by a cage 112. The rod 108has a nut 122 on it which bears against the upper end of the boss 104and thereby prevents downward movement of the rod relative to thebracket. Coiled springs 124 are mounted on the rods between the upperends of the sleeves 114 and the lower sides of nuts 126 threaded onthese spindles. The nuts are adjustable on the rods to control thecompression of the springs which permit downward displacement of therods 120 in the sleeves 114 and hence downward displacement of the ringand receptacle relative to the bracket 88 about longitudinal andtransverse axes to permit adjustment to the inclination of the bottom ofthe insole so that it is possible to secure a good seal between theupper surface of the ring and the lower surface of the insole eventhough the shoe assembly may be imperfectly clamped against the bottomsupport. The translatory movement permitted by the bracket 88 enableslowering the receptacle and ring from the lower surface of the insolesufliciently to permit lasting and suitable means is provided forefiecting such lowering in the machine in question, although it is notillustrated herein.

As related above, adhesive is supplied to the applicator ring for eachlasting operation and the surplus following lasting operations isremoved and returned to the source of supply which comprises a heatedreservoir 128 (FIGS. 5 through 8) within which solid adhesive may beplaced for melting and from and to which it is pumped by a pump 130(FIG. 8). The reservoir 128 comprises a rectangular receptacle providedwith an outer covering of insulation 132 at its bottom and sides and acover 134 hinged at 136 over an opening 138 in the top. Suitable heatingelements r2 are embedded in the bottom for melting solid adhesive placedin the reservoir. The pump 130 is fastened to the bottom of thereservoir by bolts 140 of which two are illustrated. The bolts 140 arelong enough so that when threaded into the bottom to hold the pump inplace their upper ends 141 project above the normal level of theadhesive thus making it possible to remove them while the adhesive isstill in a molten condition if it is necessary to remove the pump. Thepump itself comprises a block 142 of generally rectangular configurationcontaining spaced parallel pump chambers 144 and 146 within which thereare mounted pistons 148 and 150. The pistons 148 and 150 extend from theright end of the block 142 and are pivotally connected to a crankpin 152fixed in one end of a link 153, the opposite end of which is pivotallyconnected to the lower end of a crankarm 154. The crankarm 154 extendsupwardly from the bottom and is secured at its upper end to a shaft 156journaled transversely of the reservoir in suitable bearings 157 in thewalls with one end projecting laterally from the reservoir through thewall to which there is connected the upper end of a crankarm 160. Thelower end of the crankarm 160 is provided with a crankpin 162 and thisis pivotally connected to the forward end of a piston rod 164 projectingfrom one end of a motor cylinder 166. The opposite end of the motorcylinder 166 is pivotally mounted on a pin 168 secured to the wall ofthe reservoir. An adjustable screw 170, mounted on a bracket 172opposite the distal end of the rod 164, provides means for limiting thestroke and correspondingly the stroke of the pistons. Thus, it isevident that by supplying fluid pressure to the motor cylinder 166,reciprocable movement can be imparted to the pistons 148 and 150. Thepump block 142 is provided with a plurality of valves so thatreciprocation of the pistons 148 and 150 on one stroke force a quantityof adhesive from the reservoir to the ring 42 and on the reverse strokeexhaust the surplus adhesive from the receptacle 54. The passages to andfrom the pump to the applicator comprise in the pump block the passage170 and the passage 172 which have fittings 174 and 176 externally ofthe reservoir adapted to be connected respectively with the pipes 84 and76. During movement of the pistons 148 and 150 from right to left, thepiston 150 forces adhesive, which was drawn into the chamber 146 duringthe preceding movement from left to right, out through the valve V1 andfrom thence through passage 170', fitting 174 and pipe 84 to the ring42. The valve V2 is closed during this time.

Simultaneously the piston 148 discharges adhesive which was drawn intothe chamber 144 during the previous movement from left to right throughvalve V3 into the reservoir. The valve V4 is closed during this period.On the reverse stroke, that is from left to right, the piston 14Sexhausts surplus adhesive from the receptacle 54 through the valve V4,drawing it into the chamber 144 and the piston 150 draws a fresh supplyof adhesive from the reservoir through the valve V2 into the chamber146. During this time the valves V3 and V1 are closed.

The motor cylinder 166 is supplied with a suitable fluid pressure and acontrol valve is provided by means of which it may be manually operatedor automatically operated in proper sequence with respect to the lastingoperation. Injection should be timed so that it takes place while thering is firmly in engagement with the bottom side of the upper.

To prevent damage to the apparatus in the event that the injectionpassage becomes blocked, a safety poppettype of valve 178 is screwedinto the injection passage 172. Access to the several valves is affordedby valve covers 180, there being one such cover for each of valves V1and V4 and one for the combined valves V2 and V3.

It should be understood that the present disclosure is for the purposeof illustration only and that this invention includes all modificationsand equivalents which fall within the scope of the appended claims.

I claim:

1. In a lasting machine, a bottom support upon which the bottom of anupper and insole assembled on a last are adapted to be held bottom downpreparatory to lasting, a ring situated peripherally of the bottomsupport, said ring containing a groove designed to coincide with themarginal edge of the insole resting on the support and to which adhesiveis adapted to be supplied for application to the insole, meanssupporting the ring for substantially universal movement relative to themarginal portion of the insole while the latter is resting on the bottomsupport to insure a seal between the upper surface of the ring and themargin of the insole while adhesive is being supplied to the groove forapplication to the margin of the insole in spite of imperfect clampingof the bottom to the bottom support, and a receptacle situated below thebottom support and ring for receiving the surplus adhesive from thegroove, said receptacle containing an opening through which the adhesivecollected therein may be withdrawn from the receptacle.

2. Apparatus according to claim 1, wherein said bottom support and ringhave concave supporting surfaces for receiving the convex surface of thebottom at the forepart of the assembly.

3. Apparatus according to claim 1, wherein said support and ringcollectively confront the forepart of the bottom from the tip toapproximately the ball line, and said groove is spaced from the edge ofthe ring all the way around and has ends terminating substantially atthe ball line in communication with the receptacle.

4. Apparatus according to claim 1, wherein the inner side of the ring isspaced from the bottom support to permit surplus adhesive to flow fromthe groove through said space to the receptacle therebelow.

5. Apparatus according to claim 4, wherein the receptacle contains atrough subjacent the space between the bottom support and ring, saidtrough encircling the bottom support and terminating at its ends in awell.

6. Apparatus according to claim 1, wherein the groove contains adjacentthe toe injection openings through which adhesive is adapted to bedelivered to fill the groove.

7. Apparatus according to claim 1, wherein the bottom support, ring andreceptacle are inclined from the toe downwardly so that the adhesive inthe groove gravitates toward the rear ends of the groove into thereceptacle therebelow.

8. Apparatus according to claim 1, wherein the receptacle has a shallowtrough situated below the bottom support and a deep well at the rear endinto which the adhesive from the trough is free to flow.

9. Apparatus according to claim 1, comprising a post, and meansadjustably mounting the bottom support on the post for adjustment of itslevel relative to the ring.

10. Apparatus according to claim 1, comprising a post, means adjustablymounting the bottom support on the post, and means yieldably mountingthe ring and receptacle on the post around the bottom support.

11. Apparatus according to claim 1, comprising a post, containing aslot, a tongue to which the bottom support is secured, said tongue beingadapted to be mounted in said slot, and means threaded through thetongue and bottoming in the slot operable to adjust the bottom supporton the post.

12. Apparatus according to claim 1, comprising a post to which thebottom support is rigidly fixed, and wherein said means supporting thering comprises a sleeve mounted on the post movable axially thereon topermit lowering of the ring relative to the bottom support, and whereinsaid ring is yieldably connected to its support for tilting movementabout an axis coinciding with the median line of the bottom support andabout an axis at right angles thereto.

13. Apparatus according to claim 1, comprising injection and exhaustpipes connected to the ring and receptacle, respectively, and acombination reservoir for adhesive and a pump associated therewith foreffecting delivering of the adhesive to the injection pipe andextraction of the adhesive from the exhaust pipe, said combinationreservoir and pump comprising a pair of pump chambers, each containingintake and discharge passage, a piston in each chamber, means connectedto the pistons operable to reciprocate the pistons in unison in the samedirection, and valves arranged in said passages so that as the pistonsare moved in one direction adhesive in one pump chamber is dischargedtherefrom to the ring and adhesive in the other pump chamber isdischarged into the reservoir, and so that on the reverse strokeadhesive is drawn from the ring into said other pump chamber andadhesive is drawn from the reservoir into the one pump chamber.

14. Apparatus according to claim 1, comprising injection and exhaustpipes connected to the ring and receptacle, respectively, and acombination reservoir for adhesive and a pump associated therewith foreffecting delivery of the adhesive to the injection pipe and extractionof the adhesive from the exhaust pipe, said combination reservoir andpump comprising a pair of pump chambers, each containing intake anddischarge passages, a piston in each chamber, means connecting thepistons operable to reciprocate the pistons in unison in the samedirection, said passages comprising a passage from one pump chamber incommunication with the ring, a passage from the other pump chamber incommunication with the reservoir, said passages containing valves biasedto open during movement of the piston in one direction, a passage fromsaid other pump chamber in communication with the ring, and a passagefrom the one chamber in communication with the reservoir, said passagescontaining valves biased to open during movement of the pistons in theother direction.

15. Apparatus according to claim 1, comprising injection and exhaustpipes connected to the ring and receptacle, respectively, and acombination reservoir for adhesive and a pump associated therewith foreffecting delivery of the adhesive to the injection pipe and extractionof the adhesive from the exhaust pipe, said combination reservoir andpump comprising a pair of pump chambers, each containing intake anddischarge passages, a piston in each chamber, means connected to thepistons operable to reciprocate the pistons in unison in the samedirection, said passages comprising, in one chamber, a discharge passagein communication with the ring containing a valve biased to open whenthe piston in said chamher is moving in one direction and an intakepassage in communication with the reservoir containing a valve biased toclose when said piston is moving in said one direction, and saidpassages comprising in the other chamber a discharge passage incommunication with the reservoir containing a valve biased to open whenthe piston in said chamber is moving in said one direction and an intakepassage in communication with the ring containing a valve biased toclose when said piston is moving in said one direction.

16. Apparatus according to claim 1, comprising a post, a bracket mountedon the post, and means supporting the receptacle on the bracketcomprising a plurality of rods, the ends of which are connected,respectively, to the receptacle and to the bracket.

17. Apparatus according to claim 16, wherein the upper ends of the rodsare rotatably connected to the receptacle.

18. Apparatus according to claim 16, wherein the rods are arrangedsubstantially symmetrically with one on the longitudinal center linenear the toe and the other two at opposite sides of the center line nearthe ball.

19. Apparatus according to claim 18, comprising means non-yieldablysecuring the lower end of the one rod to the bracket, and meansyieldably securing the lower ends of the other two rods to the bracket.

20. Apparatus according to claim 16 wherein the rods are arrangedsubstantially symmetrically with one on the longitudinal center linenear the toe and the other two at opposite sides of the center line nearthe ball, and wherein the bracket contains openings for receiving thelower ends of the rods, a nut is mounted on the lower end of the rod atthe toe in engagement with the top of the bracket to prevent downwarddisplacement thereof, and a coiled spring is mounted on each of theother rods between the top of the bracket, and a nut threaded on the rodabove the bracket for yieldably permitting downward displacement of saidrods.

21. Apparatus according to claim 16, wherein the bracket is yieldablymounted on the post to enable lowering the receptacle and ring followingapplication of adhesive to the margin of the insole to permit wiping thelasting margin of the upper inwardly between the adhesive-coated edge ofthe insole and the ring, into engagement with the adhesive-coated marginof the insole.

22. Apparatus according to claim 16, wherein the bracket is yieldablymounted on the post on the upper end of a spring coiled about the postwith its lower end resting on a shoulder on said post, and there is anadjustable collar on the post above the bracket operable to fix theheightwise position of the bracket.

23. Apparatus according to claim 16, wherein a slot in the post and apin on the bracket prevent rotation of the bracket on the post butpermit yielding movement thereof.

24. Apparatus according to claim 1, comprising injection and exhaustpipes connected to the ring and receptacle, respectively, and acombination reservoir and pump, wherein the pump embodies two pistonsoperable in conjunction on one stroke to simultaneously eject a quantityof adhesive from one chamber to the ring and to return surplus adhesivefrom the other chamber to the reservoir, and on the other strokesimultaneously to take a fresh supply of adhesive from the reservoirinto the chamber and to exhaust surplus adhesive from the reservoir intothe other chamber.

25. Apparatus according to claim 24, wherein the pump has a dischargepassage adapted to be connected to the injection pipe, and there is asafety valve in said injection passage in communication with theinterior of the reservoir.

26. Apparatus according to claim 24, wherein the pump comprises twopiston chambers containing pistons, said pistons being connected to acommon crankarm, a pressure fluid operable motor operably connected tothe crankarm to effect reciprocation thereof, and means for controllingthe length of the stroke of the motor and in turn to control the strokeof the pistons.

27. Apparatus according to claim 24, wherein the pump is secured to thebottom of the reservoir by bolts extending through it from above thepump into the bottom, and wherein the bolts are of sufiicient lengththat their upper ends are situated above the normal level of the moltenadhesive to enable removing the bolts and hence the pump while theadhesive is molten.

28. In a lasting machine, a bottom support upon which the bottom of anupper and insole assembled on a last are adapted to be held bottom downpreparatory to lasting, a ring situated peripherally of the bottomsupport, said ring containing a groove designed to coincide with themarginal edge of the insole resting on a bottom support and to whichadhesive is adapted to be supplied for application to the insole, meanssupporting the ring for substantially universal movement relative to themarginal edge of the insole while the latter is resting on the bottomsupport is insure a seal between the upper surface of the ring and themargin during supply of adhesive to the said groove in spite ofimperfect clamping of the shoe bottom to the bottom support, meansmounting the last-named means on the bottom support for movementrelative to the bottom support in a direction perpendicular to thebottom to lower the ring from the marginal edge of the insole to enablewiping the lasting margin inwardly beneath the insole into engagementwith the adhesive-coated margin, and a receptacle situated below thebottom support and ring for receiving the surplus adhesive from thegroove while the ring is lowered, said receptacle containing an openingin which the adhesive collected therein may be Withdrawn from thereceptacle.

29. A lasting machine according to claim 28, comprising means foryieldably supporting said last-named means in engagement with themarginal edge of the insole, and means for limiting movement of the ringperpendicular to the bottom support in opposition to said yieldablemeans.

30. Apparatus for applying adhesive by means of an applicator to whichadhesive is delivered from a reservoir and from which the excessadhesive is returned to the reservoir, comprising an applicator, areservoir, a pump, and conductor means connecting the applicator to thepump and reservoir, said pump comprising a pair of pump chambers, eachcontaining intake and discharge passages, a piston in each chamber,means connected to the pistons operable to reciprocate the pistons inunison in the same direction, said passages comprising a passage fromthe discharge passage of one pump chamber in communication with one ofthe conductor means connecting the pump chamber to the applicator, apassage from the discharge passage of the other pump chamber incommunication with the reservoir, said passages containing valves biasedto open during movement of the pistons is one direction, a passage fromthe intake passage of the other pump chamber in communication with theconductor means connected to the applicator and a passage from theintake passage of the one chamber in communication with the reservoir,said last two mentioned passages containing valves biased to open duringmovement of the pistons in the other direction.

References Cited UNITED STATES PATENTS 3,039,121 6/1962 Weinschenk12l0.1 3,220,034 11/1965 Loi'ller et al 1212.4 X 3,228,047 1/1966Schwabe 1212.4 3,251,081 5/1966 Springer 1212.4 X

PATRICK D. LAWSON, Primary Examiner.

